Abstract: A molded tooth design of generally pyramidal form made of various hard grit materials for use on a grinding wheel for grinding non-metal materials. The tooth structure generally includes a raked face having a neutral to positive rake angle that terminates to a sharp point. The tooth structure also includes on the raked face edge portions below the point extending from both sides thereof having a predetermined clearance angle to increase penetration and reduce friction of the tooth during the grinding process. The tooth structure may also include at a top end of the rake face a truncated clearance surface which will produce a wider cutting edge that is flat, for use in attacking the work surface of the work piece being ground. The rake face of the tooth generally may also be formed to have positive rake in the truncated surface.